Are people really so dim that they can't see why this is an issue? 
The 'I couldn't get wound up by this' brigade are out in force today aren't they?! You can tell who the cheeky fuckers are who use peoples driveways to turn around in!! 
YOU may not be bothered about this, but the OP IS bothered/wound up by it, and she has a right to be. Every time a car shoves its arse onto her driveway, it's adding the damage, and wear and tear of it. Not to mention potentially dropping oil onto it if a vehicle has an oil leak.
My neighbour had a lovely shiny new tarmac drive last year (costing £2500) 2 cars wide and 3 cars deep, and every fucking day, a bunch of cheeky wassocks used it as a turnaround point, to go back out of the cul de sac, because they are apparently incapable of doing a 3 point turn in the road. 🙄
After the 25th driver had done this in the space of a week, she got bollards put up.
Another neighbour had a similar issue, and one driver bumped into the front garden fence and took the panel out! Then drove off! So she put 3 breeze blocks on her drive to stop people coming onto her drive, as she wasn't going out for a few days, and wasn't expecting anyone. She had some cheeky cunt bang on her door, as the breeze blocks had damaged the underside of their car/pulled the backbox off/part of the exhaust when they had reversed onto her driveway (in the dark) to turn around.
Yelling and cussing they were, but she just stood their stony faced and said 'sue me then. Shouldn't have reversed onto my driveway!' She never heard from them again. Idiots. 😂
@Allthenameshavegone1972 Definitely get bollards or a chain across your driveway.